﻿/*
 * BSD 3-Clause License
 *
 * Copyright (c) 2025, Kevin Robertson
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
using System.IO;

namespace Quiddity.NetBIOS
{
    class NetBIOSSessionService
    {
        // https://tools.ietf.org/html/rfc1002
        public byte Type { get; set; }
        public byte Flags { get; set; }
        public ushort Length { get; set; }

        public NetBIOSSessionService()
        {
            this.Type = 0x00;
            this.Flags = 0x00;
        }

        public NetBIOSSessionService(byte[] data)
        {
            ReadBytes(data);
        }

        public void ReadBytes(byte[] data)
        {

            using (MemoryStream memoryStream = new MemoryStream(data))
            {
                PacketReader packetReader = new PacketReader(memoryStream);
                this.Type = packetReader.ReadByte();
                this.Flags = packetReader.ReadByte();
                this.Length = packetReader.BigEndianReadUInt16();
            }

        }

        public byte[] GetBytes()
        {

            using (MemoryStream memoryStream = new MemoryStream())
            {
                PacketWriter packetWriter = new PacketWriter(memoryStream);
                packetWriter.Write(this.Type);
                packetWriter.Write(this.Flags);
                packetWriter.BigEndianWrite(this.Length);
                return memoryStream.ToArray();
            }

        }

    }
}
